is identical to the older version, just the copyright has changed. Many thanks go to Dean Gehnert of the Linux camp who went the extra mile to make this happen. Other changes: Update assembler man page to include the -v and -D options Merge in Dean's latest changes to the assembler Have the sequencer do a MSG_REJECT when the negotiated syncronous rate is lower than the adapter supports. This forces asyncronous mode which is faster at these rates anyway. This code will be moved shortly to the non-gpld portion of the tree.
whether a reconnecting target is a tagged device or not.
old value. Remove unnecessary check for active messages in setup SCB. This same test would also jump to p_mesgin_done which would "ACK" an extra time possibly confusing the target. Tell the kernel driver whenever we send an ABORT_TAG message.
- Report valid residual byte counts. We actually pause the sequencer
when the residual is non-zero. I thought about using DMA to do this,
bus sequencer program space is tight.
- Fix embarassing off by one error in the computation of a 2's
compliment variable. This was most likely the cause of the
many problems reported with the tagged queuing code.
- Handle "MAX_SYNC" as a special case (ie we are the ones starting
the sync negotiation sequence). This was done so that the target
scratch area can be initialed to 0 offset (asyncronous transfers)
safely. The initialization to 0 (was 15) is necessary since in
some cases a Wide negotiation could run into problems if SCSIRATE
was set wrong and we went into data(in/out).
- Trim the DMA routines a little by using some procedures. Net
effect is more functionality with 3 less instructions after this
update.
- Toggle the WIDEODD bit of the DFCNTRL whenever this is not the
last SG block. It has no effect in the 8bit bus configuration,
but in the Wide configuration ensures that the overlap byte is
held in the SCSI block if the transfer is odd so it will end
up in the next SG (the correct behavior).
Make $Id the version variable which required the quoted string "feature".
Print out the length of the compiled sequencer program. aic7xxx.seq: More optimizations. Replace generic bcopy routine with bcopy_3 and bcopy_4 (ie unroll the loops) since these are the only two cases used. Initialize SIMODE1 and SXFRCTL1 from the kernel in ahc_init instead of at each selection/reselection since this is expensive and only needs to be done once. Condense function returns into previous instruction if possible. Reorder some sections to kill superflous jumps. These optimizations kill the ~150k/s penalty adding support for Twin/Wide cards was costing since the last place in the commaon path of execution where we had to do ugly, convoluted testing for the type of card in the sequencer has gone away. Next stop tagged queuing and target mode.